/*****************************************************************************/
/*                                                                           */
/*                                 reginfo.c                                 */
/*                                                                           */
/*                        6502 register tracking info                        */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2001-2003 Ullrich von Bassewitz                                       */
/*               Roemerstrasse 52                                            */
/*               D-70794 Filderstadt                                         */
/* EMail:        uz@cc65.org                                                 */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/

/* common */
#include "xmalloc.h"

/* cc65 */
#include "reginfo.h"

/*****************************************************************************/
/*                                   Code                                    */
/*****************************************************************************/

void RC_Invalidate(RegContents *C)
/* Invalidate all registers */
{
  C->RegA = UNKNOWN_REGVAL;
  C->RegX = UNKNOWN_REGVAL;
  C->RegY = UNKNOWN_REGVAL;
  C->SRegLo = UNKNOWN_REGVAL;
  C->SRegHi = UNKNOWN_REGVAL;
  C->Ptr1Lo = UNKNOWN_REGVAL;
  C->Ptr1Hi = UNKNOWN_REGVAL;
  C->Tmp1 = UNKNOWN_REGVAL;
}

void RC_InvalidateZP(RegContents *C)
/* Invalidate all ZP registers */
{
  C->SRegLo = UNKNOWN_REGVAL;
  C->SRegHi = UNKNOWN_REGVAL;
  C->Ptr1Lo = UNKNOWN_REGVAL;
  C->Ptr1Hi = UNKNOWN_REGVAL;
  C->Tmp1 = UNKNOWN_REGVAL;
}

static void RC_Dump1(FILE *F, const char *Desc, short Val)
/* Dump one register value */
{
  if (RegValIsKnown(Val)) {
    fprintf(F, "%s=$%02X ", Desc, Val);
  } else {
    fprintf(F, "%s=$XX ", Desc);
  }
}

void RC_Dump(FILE *F, const RegContents *RC)
/* Dump the contents of the given RegContents struct */
{
  RC_Dump1(F, "A", RC->RegA);
  RC_Dump1(F, "X", RC->RegX);
  RC_Dump1(F, "Y", RC->RegY);
  RC_Dump1(F, "SREG", RC->SRegLo);
  RC_Dump1(F, "SREG+1", RC->SRegHi);
  RC_Dump1(F, "PTR1", RC->Ptr1Lo);
  RC_Dump1(F, "PTR1+1", RC->Ptr1Hi);
  RC_Dump1(F, "TMP1", RC->Tmp1);
  fprintf(F, "\n");
}

RegInfo *NewRegInfo(const RegContents *RC)
/* Allocate a new register info, initialize and return it. If RC is not
** a NULL pointer, it is used to initialize both, the input and output
** registers. If the pointer is NULL, all registers are set to unknown.
*/
{
  /* Allocate memory */
  RegInfo *RI = xmalloc(sizeof(RegInfo));

  /* Initialize the registers */
  if (RC) {
    RI->In = *RC;
    RI->Out = *RC;
    RI->Out2 = *RC;
  } else {
    RC_Invalidate(&RI->In);
    RC_Invalidate(&RI->Out);
    RC_Invalidate(&RI->Out2);
  }

  /* Return the new struct */
  return RI;
}

void FreeRegInfo(RegInfo *RI)
/* Free a RegInfo struct */
{
  xfree(RI);
}

void DumpRegInfo(const char *Desc, const RegInfo *RI)
/* Dump the register info for debugging */
{
  fprintf(stdout, "%s:\n", Desc);
  fprintf(stdout, "In:  ");
  RC_Dump(stdout, &RI->In);
  fprintf(stdout, "Out: ");
  RC_Dump(stdout, &RI->Out);
}
